Progeny trial is a scientific plantation established for different forestry purposes such as selection and establishment of seed sources. Tree height and diameter at breast height were examined in a 23-year-old progeny trial established by seedlings of five seed orchard populations and five seed stand populations which were mother/base populations of the orchards in Turkish red pine (Pinus brutia Ten.) to compare the seed sources for the traits in this study. Trees of seed orchard populations showed higher growth performances than that of seed stand populations for the traits. Most of the seed stand populations had higher tree height than their seed orchard populations opposite to diameter at breast height. While seed sources were similar (p>0.05), populations showed significant (p<0.05) differences for both traits according to results of analyses of variance. Tree height was more homogenous than diameter at breast based on Duncan’s multiple range tests and coefficients of variations. Positive and significant correlation (p<0.05) was found between the traits in both seed stand populations and seed orchard populations.